单项选择题
The main purpose of starting the diesel engine on air briefly is（）
A.to inspect if the cylinder has the water leakage B.to expel out the residual water/gas/oil from the cylinder C.to check if fuel supply is normal D.A and B
单项选择题 The purpose of engine stand-by is that （）
单项选择题 Which is false about engine trials?（）
单项选择题 Which of the following is false?（）
